At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
whats the probability for getting heads on all 4 coins ?
may i know why do you think it is 1/2
its a 50/50 chance to land on head.
its a 50/50 chance to land head on one coin
but when you have four coins, the probability for landing heads on "ALL" four coins need not be 1/2 right
the probability is actually 1/2*1/2*1/2*1/2 = 1/16
so what like 1/4?
oh sorry. 4 coins. my bad
Yes, another question whats the probability for getting NOT getting heads in any of the four coins ?
1/2 each so total would be another 1/16?
Yep! so P(X=0) is 1/16 and P(X=4) is also 1/16
Now, whats the probability of getting exactly ONE head ?
P(X=1) = ?
I would think 1/2 but i know thats not it
one way to get exactly ONE head is : H T T T
notice that there are 3 other ways to get exactly ONE head : T H T T T T H T T T T H
so the probability for getting exactly ONE head is 4/16 = 1/4
see if that makes sense
Yes it does, I see what you mean now. okay.
look at the options
Yes! our work so far matches perfectly with option A
Yes thats why I said A, the work matches A and not others